MR01Z28

Hey I dunno where to post this but I have been noticing when I am at W.O.T. my engine spark knocks 50% of the time I run 93 octain all the time. I have even ran some 104 octain boost and it still did it with a full tank of 93 i usally get gas from sunoco. The car did that even when it was completely stock. All it has is a slp lid smooth bellow and k&n with a catback. I am clueless to know why it does this if anyone had an idea please let me know. thanks

steelers33

Uh.... Try using a different gas company, that might make a difference. Have you ever taken it to a shop and had it looked at?

99LS1Bird

besides trying a better gas (exxon texaco shell) check your plugs and wires mabey a injector is slightly clogged, clean or replace maf

MR01Z28

thanks I have used other gas before but no luck so i usally just use sunoco
with the plugs in wires is there any plug i should get over another ? i have
76k on the plugs and wires i dont think they have ever been changed i was planning on doing it but have had to much snow lately and still recovering from a back operation but am going to do it soon. So if there is a special plug iI should get please give me some info thanks for everyones input